<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<button>fdfdfdsfd</button>
</body>
</html>
<script src="js/jquery.min.js"></script>
<script>
    try{
        console.log(1);
    }catch (err){
        console.log(err);
        console.log(10);
        if(err){
            console.log(err);
        }
    }
    $("button").click(function(){
        console.log(2);
    })
    $("button").attr("disabled","disabled");
    setTimeout(function(){
        $("button").removeAttr("disabled");
    },5000)



    function fn(a,b,c){
        if(a == 1||a == 2||a == 3){
            console.log("this is a ")
        }
        if(b == 1&&b ==2 &&b ==3){
            console.log("this is b");
        }
    }
    fn(2,3);
</script>